changing serpentine belt

[dashahman]

I want to change mine since it has many cracks in it. I want to know if someone could help me out in like making a video of them changing the belt. I have a 98 corolla so if you could that car it would be even more helpful. I been looking on youtube and seeing how it is but i'm still kinda nervous, what if it doesn't work and which belt do i get for my car they are so many sizes and i don't know what size belt my car has.